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"O" Word Origins

Where do words come from? Trace the origin and history of any English word, from its Latin, Greek or Old English roots through to its modern meaning. Every etymology is sourced.

“O” Word Origins

Orville
Welsh
Invented by Fanny Burney, possibly based on the old Welsh name Eurfyl, meaning "gold."
Orwell
Middle English
From Middle English Orewelle.
oryx
Origin
From Latin ory̆x, from Ancient Greek ὄρῠξ (órŭx, “a pickax; an oryx (the antelope)”).
os
Latin
Borrowed directly from Latin os, meaning "bone."
Osaka
Japanese
From Japanese 大阪 (Ōsaka), literally "large hill."
Osama
Arabic
Borrowed from Arabic أُسَامَة (ʔusāma).
Osamu
Japanese
Borrowed from Japanese おさむ (Osamu).
Osborn
Origin
A variant of Osborne.
Osborne
Old Norse
From Old Norse Ásbjǫrn, from áss ("god") + bjǫrn ("bear").
Oscar
Old English
The award's nickname is of disputed origin — often credited to an Academy librarian who said the statuette reminded her of her uncle Oscar. The name itself blends an old Irish name meaning roughly "deer-friend" with an Old English name meaning "spear of God."
Oscar Mike
English
From the NATO phonetic alphabet, where Oscar stands for O and Mike for M, spelling out the initials of 'on the move'.
oscillate
Origin
First attested in 1726; borrowed from Latin ōscillātus, perfect passive participle of Latin ōscillō (“to swing”) (see -ate (verb-forming suffix)), from ōscillum (“a swing”), usually identified with ōscillum (“a little face or mask hung on a tree that sways with the wind”), diminutive of ōs (“mouth, face”). See also osculate.
oscillation
Origin
From French oscillation, from Latin oscillatio, from Latin oscillo. By surface analysis, oscillate + -ion.
oscillator
Latin
Formed by adding the agent suffix "-or" to "oscillate," from Latin oscillare, "to swing."
oscitancy
Origin
From Latin oscitans + -cy, present participle of ōscitō (“to yawn, gape, open the mouth”), from Latin os (“the mouth”).
oscitant
Origin
From Latin ōscitāns, present participle of ōscitō. Compare French oscitant.
osculate
Origin
Borrowed from Latin ōsculātus, perfect active participle of ōsculor (“to kiss”) (see -ate (verb-forming suffix)), from ōsculum (“a kiss”) + -or (verbal suffix), from ōs (“mouth”) + -culum (diminutive suffix). See also oscillate.
osculation
Origin
From Latin ōsculātiō (“a kissing”), from ōsculor (“to kiss”). By surface analysis, osculate + -ion.
osculator
Origin
From osculate + -or.
Oshima
Japanese
From Japanese 大島 (Ōshima), literally "big island."
osier
Origin
Borrowed from French osier (“basket willow, withy”)
Osiris
Ancient Greek
Borrowed via Latin Osiris from Ancient Greek Ósīris, itself adapted from the Egyptian name wsjr.
Oslo
Old Norse
From Old Norse Ósló, possibly from áss ("god") + ló ("meadow").
Osman
Old Norse
Comes down through Ottoman Turkish and Arabic, ultimately related to the Old Norse name Ásmundr, meaning roughly "divine protection."
Osmond
Old Norse
From Old Norse Ásmundr, from áss ("god") + mund ("protection").
osmosis
Greek
From Greek osmos 'a pushing, thrusting', with the noun ending -osis; it entered scientific English in the nineteenth century.
osmotherley
Origin
From the Old Norse personal name Ásmundr + Old English hlaw (“hill”).
Oso
Spanish
Borrowed straight from Spanish oso, meaning "bear."
osprey
Medieval Latin
From Middle English ospray, via Anglo-Norman ospriet, ultimately from Medieval Latin avis praedae, "bird of prey" — a phrase that got mixed up in Old French with this particular bird.
oss
Old English
Origin unclear; possibly connected to Old English hālsian ("to beseech, entreat"), though the sense has shifted considerably over time.
osseous
Origin
Borrowed from Latin osseus (“bony, (attributive) bone”), from os (“bone”) + -eus.
ossifrage
Origin
From Middle French ossifrage, from Latin ossifraga (“osprey”), ossifragus (“osprey”), from ossifragus (“bone breaking”).
Ostend
Dutch
As a place name, the Belgian coastal city Ostend comes from Dutch Oostende, literally "east end," describing its position at the eastern tip of a former island.
ostensible
Origin
Borrowed from French ostensible, formed with the suffix -ible, from Latin ostensus, the past participle of ostendō (“show”), itself from obs- (“in front of”) (akin to ob- (“in the way”)) + tendō (“stretch”) (akin to Ancient Greek τείνω (teínō)). Cf. also Medieval Latin ostensibilis.
ostensibly
Latin
Built from "ostensible" (from Latin ostentare, "to show off, display") plus the adverb-forming suffix "-ly."
ostensive
Origin
From Middle French ostensif and its etymon Late Latin ostēnsīvus.
ostentate
Origin
Borrowed from Latin ostentātus, perfect passive participle of ostentō (see -ate (verb-forming suffix)), intensive from ostendō. Doublet of ostent.
ostentation
Origin
Originated 1425–75 from late Middle English ostentacioun, borrowed from Middle French ostentation and its etymon Latin ostentātiō, ostentātiōnem, equivalent to ostentātus (past participle of ostentāre, to display or exhibit), frequentative of ostendere (“to present, display”) + -iōn. By surface analysis, ostent + -ation.
ostentatious
Latin · 1590
From Latin ostentatus ("displayed, shown off") plus "-ious," entering English around 1590.
osteoporosis
Ancient Greek
From Ancient Greek osteon ("bone") plus porosis ("becoming porous"), itself from poros, a term for porous rock — literally "porous bone condition."
Ostia
Latin
* (Roman Empire): Latin Ostia * (Italy): Italian Ostia, from Latin Ostia
ostiary
Origin
Borrowed from Latin ostiārius, from ostium (“door, entrance”). See usher, which may be a doublet.
ostracism
Origin
Learned borrowing from Ancient Greek ὀστρακισμός (ostrakismós, “banishment by means of voting with pot shards”), from ὀστρακίζω (ostrakízō, “ostracize”) + -ισμός (-ismós, “-ism”), from ὄστρακον (óstrakon, “clay pot”).
ostracize
Origin
From Ancient Greek ὀστρακίζω (ostrakízō, “to banish from a city by ostracism”), from ὄστρᾰκον (óstrăkon, “earthenware vessel; fragment of such a vessel, potsherd”) (from the fact that when voting was held to decide whether to banish people, their names were inscribed on potsherds) + -ῐ́ζω (-ĭ́zō, suffix forming verbs)). The English word is cognate with French ostraciser.
ostrich
Vulgar Latin
From Middle English ostrich, via Old French ostruce, from Vulgar Latin roots combining "bird" and a word borrowed from Greek for the same bird — itself thought to come from "sparrow" plus "camel," describing its odd mix of bird and beast-like features.
Oswald
Old English
From Old English Ōsweald, from ōs ("god") + weald ("power").
Oswin
Old English
From Old English Oswine, from ōs ("god") + wine ("friend").
Ota
Japanese
Transliteration of Japanese 大田 (Ōta).